Ballantine Books is one of America's largest publishers of hardcover, trade paperback, and mass market paperback books. Founded in 1952, Ballantine was acquired by Random House in 1973. Its imprints include Ballantine Books, Ballantine Reader's Circle, Del Rey, Del Rey/LucasBooks, Fawcett, Ivy, One World, and Wellspring. Ballantine Books includes a backlist of more than 3,000 titles.